Home / 12,386.35-18,579.38-5,807.90

Finding the Fourth Proportional to 12,386.35, 18,579.38 and 5,807.90

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Solution

The fourth proportional to 12,386.35, 18,579.38 and 5,807.90 is: 8,711.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.35 : 18,579.38 = 5,807.90 : x
  2. Step 2: Convert to fraction form
    12,386.35/18,579.38 = 5,807.90/x
  3. Step 3: Cross multiply
    12,386.35x = 18,579.38 × 5,807.90
  4. Step 4: Simplify right side
    12,386.35x = 107,907,198.51
  5. Step 5: Solve for x
    x = 107,907,198.51/12,386.35
  6. Step 6: Final answer
    x = 8,711.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.